Let’s check the MBR side of things – also remember to take note of the index number here as well: fdisk /dev/disk3 If you only have one partition then it will most likely be “1”. You should take note of the index number next to the partition.
Let’s take a look at the raw partition table: gpt -r show disk3 Note the name of the partition and the volume. I’ll be using disk3 as an example.įind out which disk we need to do surgery on: diskutil list If at any point you get permission errors, preface the commands with sudo (eg.: sudo fdisk /dev/disk3). Open up Terminal and let’s get destructive!ĭisclaimer: you are exclusively responsible for taking these steps by following along.
We are going to destroy the complete partition map so that the drive can be reformatted into one whole partition using Disk Utility – essentially, a clean slate.
Multiple partition external drive partitioning requires some extra steps to be done. The built-in Disk Utility app is suprisingly negligent with external drives that have at least one non-HFS+/APFS partitions on it.
